Motor unit
US11201523B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2017 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Dec 13, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/19
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor unit includes a motor including a rotor to rotate about a motor axis, a reduction gear including an intermediate gear to rotate about an intermediate axis and connected to the motor, a differential including a ring gear to rotate about a differential axis and connected to the reduction gear, a housing including a housing space to house the motor, the reduction gear, and the differential, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space to be fed to the motor. The housing includes a ceiling portion directly above the reduction gear and the differential. At least a portion of the ring gear is lower than a liquid surface of the oil in the vertically lower region of the housing space. The motor axis, the intermediate axis, and the differential axis extend in parallel with one another along a horizontal direction. Each of the intermediate axis and the differential axis is lower than the motor axis. The ceiling portion is substantially parallel to an imaginary line imaginarily joining the motor axis and the differential axis when viewed in an axial direction of the motor axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.